Chaim of Volozhin (also known as Chaim ben Yitzchok of Volozhin or Chaim Ickovits; 21 January 1749 – 14 June 1821) was a rabbi, Talmudist, and ethicist. Popularly known as "Reb Chaim Volozhiner" or simply as "Reb Chaim", he was born in Volozhin (a.k.a. Vałožyn or Valozhyn) when it was a part of the Polish–Lithuanian Commonwealth. He died there while it was under the control of the Russian Empire. The title of his major work is Nefesh Ha-Chaim. Source: Wikipedia (en)